Cheap flights from Ontario to Illinois from C$ 195
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 8/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Sun 13/12
8:05 a.m.-9:08 a.m.
Nonstop2h 03m
Chicago O'Hare Intl
Mon 14/12
8:50 p.m.-11:32 p.m.
Nonstop1h 42m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Thu 29/10
4:30 p.m.-5:43 p.m.
Nonstop2h 13m
Chicago O'Hare Intl
Sun 1/11
8:45 a.m.-11:27 a.m.
Nonstop1h 42m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Sat 31/10
5:55 p.m.-7:05 p.m.
Nonstop2h 10m
Chicago O'Hare Intl
Sun 1/11
5:55 a.m.-2:25 p.m.
1 stop7h 30m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Sat 7/11
7:44 p.m.-7:29 a.m.
1 stop12h 45m
Chicago O'Hare Intl
Sun 8/11
1:57 p.m.-4:47 p.m.
Nonstop1h 50m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Fri 4/12
7:44 p.m.-9:37 a.m.
1 stop14h 53m
Chicago O'Hare Intl
Sat 5/12
6:17 p.m.-9:15 p.m.
Nonstop1h 58m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Fri 4/12
7:44 p.m.-11:29 p.m.
1 stop4h 45m
Chicago O'Hare Intl
Sat 5/12
11:05 a.m.-2:03 p.m.
Nonstop1h 58m
TorontoChicago
YTZ Toronto Island - ORD Chicago O'Hare Intl
YTZORD
Toronto Island
Fri 6/11
4:35 p.m.-5:40 p.m.
Nonstop2h 05m
Chicago O'Hare Intl
Sun 8/11
12:15 p.m.-3:00 p.m.
Nonstop1h 45m
TorontoChicago
YTZ Toronto Island - ORD Chicago O'Hare Intl
YTZORD
Toronto Island
Sun 15/11
10:30 a.m.-11:35 a.m.
Nonstop2h 05m
Chicago O'Hare Intl
Wed 18/11
12:15 p.m.-3:00 p.m.
Nonstop1h 45m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Thu 5/11
7:09 a.m.-8:39 a.m.
Nonstop2h 30m
Chicago O'Hare Intl
Sun 8/11
9:42 a.m.-12:32 p.m.
Nonstop1h 50m
TorontoChicago
YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl
YYZORD
Toronto Pearson Intl
Thu 3/12
3:22 p.m.-4:42 p.m.
Nonstop2h 20m
Chicago O'Hare Intl
Fri 4/12
2:50 p.m.-5:43 p.m.
Nonstop1h 53m
See travel insights to Illinois from
How to get the cheapest flight ticket from Region of Ontario to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
In general, January is the cheapest month to fly from Region of Ontario to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 363. If you don’t want to visit Illinois in January, then you should wait until February to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 385.
What is the cheapest day to depart on your flight to Illinois?
According to our data, Friday is the cheapest day to fly to Illinois from Region of Ontario. The lowest ticket price found for a Friday departure recently was C$ 705. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Sunday, with ticket prices averaging around C$ 986.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as C$ 744. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are C$ 1,140 on average. Flights to Illinois from Region of Ontario in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Ontario to Illinois flight route?
Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices
How far in advance should I book a flight from Ontario to Illinois?
You are more likely to see cheaper flights to Illinois from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 447 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Region of Ontario for as low as C$ 322 on momondo.
What cabin class options are available on Region of Ontario to Illinois flights?
There are 4 cabin classes available to choose from on Region of Ontario to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Illinois?
Air Canada, Porter Airlines, and Delta are the most popular carriers operating from Ontario to Illinois
Which airlines fly to Illinois?
Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Illinois from Region of Ontario according to our data. Air Canada is the first choice among our users, with 60% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Region of Ontario to Illinois on average per day?
As of October 2026, 84 flights take off from Region of Ontario and land in Illinois each day. The most common flight departure time for this route is 1:00p.m., with 43% of daily flights taking off at noon.
How many flights depart from Region of Ontario to Illinois on average per week?
593 flights are operational weekly from Region of Ontario to Illinois as of October 2026. The most popular departure day for this route is Fri, with 16% of flights per week taking off on this day.
Cheap Region of Ontario to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois
Frequently asked questions about flying from Ontario to Illinois
When did momondo last update prices for flights from Ontario to Illinois?
Prices for flights from Ontario to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Illinois?
There are 5 operators available for flights from Ontario to Illinois as of October 2026.
How old do you have to be to fly from Ontario to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to Illinois is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 23.54% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 10.92%, Boeing 737-900 at 9.35%, and Airbus A320-100/200 at 7.19%.
Best airlines flying from Region of Ontario to Illinois
Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 138 | Free Cancellation | Rating 7.1 11,762 reviews | |||
| PriceFrom C$ 255 | Free Cancellation | Rating 8.0 468 reviews | |||
| PriceFrom C$ 268 | Free Cancellation | Rating 7.0 12,156 reviews | |||
| PriceFrom C$ 302 | Free Cancellation | Rating 7.4 10,351 reviews | |||
| PriceFrom C$ 380 | Free Cancellation | Rating 7.2 3,448 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Illinois?
It is quick and easy to find Ontario to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from Ontario to Illinois with flexible booking policies on momondo?
Flights from Ontario to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ontario to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ontario.
I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.